AV-3408TEE
SERVICE ADJUSTMENTS [AV-3408TEE/B]
ADJUSTMENTS
B1 POWER SUPPLY
Measuring
ItemTest pointAdjustment partDescription
instrument
Check ofSignalB1 (pin 1)1. Receive a black and white signal.
B1 POWERGeneratorGND (pin 5)2. Connect a DC voltmeter between B1 and GND
SUPPLY[CN00S(between pins 1 and 5 of the connector CN00S).
DC Voltmeter connector]3. Make sure that the voltage is DC134.5 ? 2V.
FOCUS ADJUSTMENT
Measuring
ItemTest pointAdjustment partDescription
instrument
AdjustmentSignalFOCUS VR1,2Notes:
of FOCUSgenerator[In HVT]YProceed to the following this adjustment after having completed the
adjustments of B1 POWER SUPPLY, SUB BRIGHT and SUB CONT.
YSet PICTURE MODE (VSM) to OBRIGHT�.
YThe final adjustment of CONVERGENCE must be done after the
FOCUS adjustment. (CONVERGENCE is changed by FOCUS ad-
justment.)
When makes difference by FOCUS adjustment, should be reconfirming
PURITY adjustment.
1. Receive a cross-hatch signal.
2. While looking at the screen centre, adjust the FOCUS VR2 (F2) so
that the horizontal lines will be clear and in fine detail.
3. Adjust the FOCUS VR1 (F1) so that the vertical lines will be clear
and in fine detail.
4. Make sure that the picture is in focus even when the screen gets
darkened.
IF CIRCUIT ADJUSTMENT
Measuring
ItemTest pointAdjustment partDescription
instrument
AdjustmentRemoteVCO (CW)Note:
of VCO (CW)control unitYUnder normal conditions, no adjustment is required.
1. Select 1. IF from the SERVICE MENU.
VCO (CW) . MHz2. Select 1. VCO by pressing the 1 key on the remote control unit.fv
3. Receive a broadcast signal.
TOO HIGH
4. Check the characters colour of the BELOW REFERENCE displayed
ABOVE REFERENCE
BELOW REFERENCEYELLOWto yellow.
TOO LOW5. Press the DISPLAY key three times to return to normal screen.
DISPLAY : EXIT
AdjustmentRemoteDELAY POINT1. Receive a black and white broadcast signal (colour off).
of DELAYcontrol unit(AGC TAKE-OVER)2. Select 1. IF from the SERVICE MENU.
POINT3. Select 2. DELAY POINT by pressing the 2 key on the remote con-
trol unit.
4. Adjust the MENU �/+ key in order to eliminate any noise or beat
Setting
Initial setting valuefrom the image. Any increase above the initial value produces noise
(Adjustment time)
and any decrease below it produces beat.
DELAY POINTNTSC 3.5822
5. Press the DISPLAY key three times to return to the normal screen.
(AGC TAKE-OVER)
OTHERS156. Turn to other channels and make sure that there are no irregulari-
ties.
50No. 51901 |
ACEC
